acicular ferrite

The results showed that Ti and Ti compound oxides could promote the formation of acicular ferrite, the low temperature toughness of high heat input welding HAZ significantly improved.

结果表明，Ti及Ti的复合氧化物具有促进晶内针状铁素体形核的能力，大热输入焊接时HAZ的低温韧性显著提高。

Study on the Acicular Ferrite with Basket-Weave Morphology in Deposited Metal

熔敷金属中筐篮编织状针状铁素体组织研究

mainly its metallographic structure consists of acicular ferrite and martensite.

钢的组织主要由针状铁素体和马氏体两相组成。

Observation of Acicular Ferrite Formation in the Zr Doped Low Alloy Steel

含锆微合金钢焊接区针状铁素体形成观察

The typical microstructure ( Q235): the surface layer is tempered sorbite; the transition layer is pearlite and ferrite, and the partial ferrite is acicular; the core is pearlite and ferrite and the grain fineness is 8~ 10 grade.

钢筋典型的金相组织（Q235）表层为回火索氏体，过渡层为珠光体+铁素体且部分铁素体呈针状，心部为珠光体+铁素体，晶粒度8～10级；

The result showed that the microstructure dominated by fine and homogeneous acicular ferrite had the better resistance to SSCC.

结果表明：均匀细小的针状铁素体为主的显微组织具有优良的抗SSCC性能；

The weld metal showed very good toughness at low temperature, and dominant microstructure of acicular ferrite.

结果表明:所研制焊丝的焊缝金属具有优良的低温韧性, 且实现了以得到针状铁素体组织为主的设计目标.

Study of Welding Thermal Sensitivity on Acicular Ferrite Pipeline Steel

针状铁素体管线钢焊接热敏感性的研究